Is the RC 390 a good bike for an upgrade to the KTM RC 490?

The KTM RC 490 has been a hot topic in the world of motorcycles and especially in the world of the RC 390 enthusiast. With added engine capacity and a boost in potential performance, many riders are asking if it's an upgrade worth making. But things like price, maintenance cost, and real-world performance differences play a role. The RC 390 is already a capable machine for street and track use; some say, while others feel the RC 490 would give a little extra edge to more experienced riders. The debate also centers around whether the RC 490 closes a gap that KTM desperately needs to fill in its lineup or if it is just marketing a new segment of bikes.